Which one?
Maybe pythons - some types of crocodile/alligators. But that's very region specific.
Sharks as well.
Sturgeon. Maybe lamprey (I've never tried it)
Molluscs? Snails have been around a very long time in one form or another.
Oysters and other bivalves too...
Catshark maybe, although I don't know if that species in particular is old enough.
Maybe pythons - some types of crocodile/alligators. But that's very region specific.
Sharks as well.
Sturgeon. Maybe lamprey (I've never tried it)
Molluscs? Snails have been around a very long time in one form or another.
Oysters and other bivalves too...
Catshark maybe, although I don't know if that species in particular is old enough.